Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4134621d74fb63…

MALICIOUS

PDF

102.1 KB Created: 2021-07-15 22:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 676b5d0a2021c98d9a9ac1a18d7bdc13 SHA-1: 3eb3843400414dccbe1a44bce69839e72c52f0e9 SHA-256: da4134621d74fb6386a3c4c4c1a70786c94fd065490486082e1e395b47233067
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a malicious PDF by ClamAV, specifically as 'Pdf.Phishing.Trojan'. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3199

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/a6323df5842a2d6b78e8635762c0ca60/venelasafibo.pdf In PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49170743021.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7a7b7775c66a987276e5bd2e4ce60925/dirubemokir.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/8a0e8e9267700c20e78970abcfb2a414/kunebipilu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/v4sdlukvhet917lj0rh6f91495/gokevunepufewobidarosu.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/95ab6c780f4e27f34af549de338a4b56/rawejedologabojotu.pdfIn PDF document text
    • http://moon-villa123.com/CKEdit/upload/files/95990005618.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad2348555e---nipupimujawoxo.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/31136e247ecd399170cb82b47c3427d9/zunati.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/61470723870.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0871e28088---levekona.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7b2410f8d---gisanoguluvubadorip.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/nusaxigeruw.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b6dfbe09bb9c3b62ec5dc7e3225705ad/tisagajafetufese.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4af8a61d9---36782391578.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/xivanurikemewiwukazo.pdfIn PDF document text
    • http://abwessex.com/uploads/files/30878874235.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/8kthmmns45gqgnfcsos2sqrfi0/bojaratatunuvipotanuvevu.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0124885d4a---bekoxebozelerutasorokek.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/luzawe.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/9e6e72d65f4de5aefe20e60a880b21bb/komugokujofe.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/74516390674.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f5c414707---12741906689.pdfIn PDF document text
    • http://ehs1958.org/clients/73155/File/38416607610.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/844353363.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=mtg+arena+quick+draft+guidePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001538d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1538D 10648 bytes
SHA-256: 04c17945669d372c284a2f217a1889ed9b9602c3bfc1cc9b051bde3665df8bff
font_02_sfnt_off00016b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B85 17996 bytes
SHA-256: fb65cafbc20e21c133b0fe7a979618ddd9bbb07b5e2730b2db2b0b411d479560

Open this report in the interactive analyzer, or submit your own file for analysis.